/
IMG_xcf.c
951 lines (816 loc) · 24 KB
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/*
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SDL_image: An example image loading library for use with SDL
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Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
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*/
/* This is a XCF image file loading framework */
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#include "SDL_endian.h"
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#include "SDL_image.h"
#ifdef LOAD_XCF
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#if DEBUG
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static char prop_names [][30] = {
"end",
"colormap",
"active_layer",
"active_channel",
"selection",
"floating_selection",
"opacity",
"mode",
"visible",
"linked",
"preserve_transparency",
"apply_mask",
"edit_mask",
"show_mask",
"show_masked",
"offsets",
"color",
"compression",
"guides",
"resolution",
"tattoo",
"parasites",
"unit",
"paths",
"user_unit"
};
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#endif
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typedef enum
{
PROP_END = 0,
PROP_COLORMAP = 1,
PROP_ACTIVE_LAYER = 2,
PROP_ACTIVE_CHANNEL = 3,
PROP_SELECTION = 4,
PROP_FLOATING_SELECTION = 5,
PROP_OPACITY = 6,
PROP_MODE = 7,
PROP_VISIBLE = 8,
PROP_LINKED = 9,
PROP_PRESERVE_TRANSPARENCY = 10,
PROP_APPLY_MASK = 11,
PROP_EDIT_MASK = 12,
PROP_SHOW_MASK = 13,
PROP_SHOW_MASKED = 14,
PROP_OFFSETS = 15,
PROP_COLOR = 16,
PROP_COMPRESSION = 17,
PROP_GUIDES = 18,
PROP_RESOLUTION = 19,
PROP_TATTOO = 20,
PROP_PARASITES = 21,
PROP_UNIT = 22,
PROP_PATHS = 23,
PROP_USER_UNIT = 24
} xcf_prop_type;
typedef enum {
COMPR_NONE = 0,
COMPR_RLE = 1,
COMPR_ZLIB = 2,
COMPR_FRACTAL = 3
} xcf_compr_type;
typedef enum {
IMAGE_RGB = 0,
IMAGE_GREYSCALE = 1,
IMAGE_INDEXED = 2
} xcf_image_type;
typedef struct {
Uint32 id;
Uint32 length;
union {
struct {
Uint32 num;
char * cmap;
} colormap; // 1
struct {
Uint32 drawable_offset;
} floating_selection; // 5
Sint32 opacity;
Sint32 mode;
int visible;
int linked;
int preserve_transparency;
int apply_mask;
int show_mask;
struct {
Sint32 x;
Sint32 y;
} offset;
unsigned char color [3];
Uint8 compression;
struct {
Sint32 x;
Sint32 y;
} resolution;
struct {
char * name;
Uint32 flags;
Uint32 size;
char * data;
} parasite;
} data;
} xcf_prop;
typedef struct {
char sign [14];
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Uint32 file_version;
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Uint32 width;
Uint32 height;
Sint32 image_type;
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Uint32 precision;
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xcf_prop * properties;
Uint32 * layer_file_offsets;
Uint32 * channel_file_offsets;
xcf_compr_type compr;
Uint32 cm_num;
unsigned char * cm_map;
} xcf_header;
typedef struct {
Uint32 width;
Uint32 height;
Sint32 layer_type;
char * name;
xcf_prop * properties;
Uint32 hierarchy_file_offset;
Uint32 layer_mask_offset;
Uint32 offset_x;
Uint32 offset_y;
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int visible;
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} xcf_layer;
typedef struct {
Uint32 width;
Uint32 height;
char * name;
xcf_prop * properties;
Uint32 hierarchy_file_offset;
Uint32 color;
Uint32 opacity;
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int selection;
int visible;
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} xcf_channel;
typedef struct {
Uint32 width;
Uint32 height;
Uint32 bpp;
Uint32 * level_file_offsets;
} xcf_hierarchy;
typedef struct {
Uint32 width;
Uint32 height;
Uint32 * tile_file_offsets;
} xcf_level;
typedef unsigned char * xcf_tile;
typedef unsigned char * (* load_tile_type) (SDL_RWops *, Uint32, int, int, int);
/* See if an image is contained in a data source */
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int IMG_isXCF(SDL_RWops *src)
{
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Sint64 start;
int is_XCF;
char magic[14];
if ( !src )
return 0;
start = SDL_RWtell(src);
is_XCF = 0;
if ( SDL_RWread(src, magic, sizeof(magic), 1) ) {
if (SDL_strncmp(magic, "gimp xcf ", 9) == 0) {
is_XCF = 1;
}
}
SDL_RWseek(src, start, RW_SEEK_SET);
return(is_XCF);
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}
static char * read_string (SDL_RWops * src) {
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Sint64 remaining;
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Uint32 tmp;
char * data;
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tmp = SDL_ReadBE32(src);
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remaining = SDL_RWsize(src) - SDL_RWtell(src);
if (tmp > 0 && (Sint32)tmp <= remaining) {
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data = (char *) SDL_malloc (sizeof (char) * tmp);
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if (data) {
SDL_RWread(src, data, tmp, 1);
data[tmp - 1] = '\0';
}
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}
else {
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data = NULL;
}
return data;
}
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static Uint64 read_offset (SDL_RWops * src, const xcf_header * h) {
Uint64 offset; // starting with version 11, offsets are 64 bits
offset = (h->file_version >= 11) ? (Uint64)SDL_ReadBE32 (src) << 32 : 0;
offset |= SDL_ReadBE32 (src);
return offset;
}
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static Uint32 Swap32 (Uint32 v) {
return
((v & 0x000000FF) << 16)
| ((v & 0x0000FF00))
| ((v & 0x00FF0000) >> 16)
| ((v & 0xFF000000));
}
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static int xcf_read_property (SDL_RWops * src, xcf_prop * prop) {
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Uint32 len;
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prop->id = SDL_ReadBE32 (src);
prop->length = SDL_ReadBE32 (src);
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#if DEBUG
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printf ("%.8X: %s(%u): %u\n", SDL_RWtell (src), prop->id < 25 ? prop_names [prop->id] : "unknown", prop->id, prop->length);
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#endif
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switch (prop->id) {
case PROP_COLORMAP:
prop->data.colormap.num = SDL_ReadBE32 (src);
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prop->data.colormap.cmap = (char *) SDL_malloc (sizeof (char) * prop->data.colormap.num * 3);
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SDL_RWread (src, prop->data.colormap.cmap, prop->data.colormap.num*3, 1);
break;
case PROP_OFFSETS:
prop->data.offset.x = SDL_ReadBE32 (src);
prop->data.offset.y = SDL_ReadBE32 (src);
break;
case PROP_OPACITY:
prop->data.opacity = SDL_ReadBE32 (src);
break;
case PROP_COMPRESSION:
case PROP_COLOR:
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if (prop->length > sizeof(prop->data)) {
len = sizeof(prop->data);
} else {
len = prop->length;
}
SDL_RWread(src, &prop->data, len, 1);
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break;
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case PROP_VISIBLE:
prop->data.visible = SDL_ReadBE32 (src);
break;
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default:
// SDL_RWread (src, &prop->data, prop->length, 1);
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if (SDL_RWseek (src, prop->length, RW_SEEK_CUR) < 0)
return 0; // ERROR
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}
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return 1; // OK
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}
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static void free_xcf_header (xcf_header * h) {
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if (h->cm_num)
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SDL_free (h->cm_map);
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if (h->layer_file_offsets)
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SDL_free (h->layer_file_offsets);
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SDL_free (h);
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}
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static xcf_header * read_xcf_header (SDL_RWops * src) {
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xcf_header * h;
xcf_prop prop;
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h = (xcf_header *) SDL_malloc (sizeof (xcf_header));
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if (!h) {
return NULL;
}
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SDL_RWread (src, h->sign, 14, 1);
h->width = SDL_ReadBE32 (src);
h->height = SDL_ReadBE32 (src);
h->image_type = SDL_ReadBE32 (src);
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h->file_version = (h->sign[10] - '0') * 100 + (h->sign[11] - '0') * 10 + (h->sign[12] - '0');
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#ifdef DEBUG
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printf ("XCF signature : %.14s (version %u)\n", h->sign, h->file_version);
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printf (" (%u,%u) type=%u\n", h->width, h->height, h->image_type);
#endif
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if (h->file_version >= 4)
h->precision = SDL_ReadBE32 (src);
else
h->precision = 150;
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h->properties = NULL;
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h->layer_file_offsets = NULL;
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h->compr = COMPR_NONE;
h->cm_num = 0;
h->cm_map = NULL;
// Just read, don't save
do {
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if (!xcf_read_property (src, &prop)) {
free_xcf_header (h);
return NULL;
}
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if (prop.id == PROP_COMPRESSION)
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h->compr = (xcf_compr_type)prop.data.compression;
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else if (prop.id == PROP_COLORMAP) {
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// unused var: int i;
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Uint32 cm_num;
unsigned char *cm_map;
cm_num = prop.data.colormap.num;
cm_map = (unsigned char *) SDL_realloc(h->cm_map, sizeof (unsigned char) * 3 * cm_num);
if (cm_map) {
h->cm_num = cm_num;
h->cm_map = cm_map;
SDL_memcpy (h->cm_map, prop.data.colormap.cmap, 3*sizeof (char)*h->cm_num);
}
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SDL_free (prop.data.colormap.cmap);
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if (!cm_map) {
free_xcf_header(h);
return NULL;
}
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}
} while (prop.id != PROP_END);
return h;
}
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static void free_xcf_layer (xcf_layer * l) {
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SDL_free (l->name);
SDL_free (l);
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}
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static xcf_layer * read_xcf_layer (SDL_RWops * src, const xcf_header * h) {
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xcf_layer * l;
xcf_prop prop;
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l = (xcf_layer *) SDL_malloc (sizeof (xcf_layer));
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l->width = SDL_ReadBE32 (src);
l->height = SDL_ReadBE32 (src);
l->layer_type = SDL_ReadBE32 (src);
l->name = read_string (src);
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#ifdef DEBUG
printf ("layer (%d,%d) type=%d '%s'\n", l->width, l->height, l->layer_type, l->name);
#endif
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do {
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if (!xcf_read_property (src, &prop)) {
free_xcf_layer (l);
return NULL;
}
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if (prop.id == PROP_OFFSETS) {
l->offset_x = prop.data.offset.x;
l->offset_y = prop.data.offset.y;
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} else if (prop.id == PROP_VISIBLE) {
l->visible = prop.data.visible ? 1 : 0;
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} else if (prop.id == PROP_COLORMAP) {
SDL_free (prop.data.colormap.cmap);
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}
} while (prop.id != PROP_END);
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l->hierarchy_file_offset = read_offset (src, h);
l->layer_mask_offset = read_offset (src, h);
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return l;
}
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static void free_xcf_channel (xcf_channel * c) {
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SDL_free (c->name);
SDL_free (c);
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}
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static xcf_channel * read_xcf_channel (SDL_RWops * src, const xcf_header * h) {
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xcf_channel * l;
xcf_prop prop;
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l = (xcf_channel *) SDL_malloc (sizeof (xcf_channel));
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l->width = SDL_ReadBE32 (src);
l->height = SDL_ReadBE32 (src);
l->name = read_string (src);
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#ifdef DEBUG
printf ("channel (%u,%u) '%s'\n", l->width, l->height, l->name);
#endif
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l->selection = 0;
do {
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if (!xcf_read_property (src, &prop)) {
free_xcf_channel (l);
return NULL;
}
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switch (prop.id) {
case PROP_OPACITY:
l->opacity = prop.data.opacity << 24;
break;
case PROP_COLOR:
l->color = ((Uint32) prop.data.color[0] << 16)
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| ((Uint32) prop.data.color[1] << 8)
| ((Uint32) prop.data.color[2]);
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break;
case PROP_SELECTION:
l->selection = 1;
break;
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case PROP_VISIBLE:
l->visible = prop.data.visible ? 1 : 0;
break;
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default:
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;
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}
} while (prop.id != PROP_END);
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l->hierarchy_file_offset = read_offset (src, h);
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return l;
}
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static void free_xcf_hierarchy (xcf_hierarchy * h) {
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SDL_free (h->level_file_offsets);
SDL_free (h);
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}
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static xcf_hierarchy * read_xcf_hierarchy (SDL_RWops * src, const xcf_header * head) {
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xcf_hierarchy * h;
int i;
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h = (xcf_hierarchy *) SDL_malloc (sizeof (xcf_hierarchy));
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h->width = SDL_ReadBE32 (src);
h->height = SDL_ReadBE32 (src);
h->bpp = SDL_ReadBE32 (src);
h->level_file_offsets = NULL;
i = 0;
do {
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h->level_file_offsets = (Uint32 *) SDL_realloc (h->level_file_offsets, sizeof (Uint32) * (i+1));
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h->level_file_offsets [i] = read_offset (src, head);
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} while (h->level_file_offsets [i++]);
return h;
}
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static void free_xcf_level (xcf_level * l) {
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SDL_free (l->tile_file_offsets);
SDL_free (l);
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}
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static xcf_level * read_xcf_level (SDL_RWops * src, const xcf_header * h) {
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xcf_level * l;
int i;
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l = (xcf_level *) SDL_malloc (sizeof (xcf_level));
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l->width = SDL_ReadBE32 (src);
l->height = SDL_ReadBE32 (src);
l->tile_file_offsets = NULL;
i = 0;
do {
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l->tile_file_offsets = (Uint32 *) SDL_realloc (l->tile_file_offsets, sizeof (Uint32) * (i+1));
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l->tile_file_offsets [i] = read_offset (src, h);
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} while (l->tile_file_offsets [i++]);
return l;
}
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static void free_xcf_tile (unsigned char * t) {
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SDL_free (t);
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}
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static unsigned char * load_xcf_tile_none (SDL_RWops * src, Uint32 len, int bpp, int x, int y) {
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unsigned char * load;
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load = (unsigned char *) SDL_malloc (len); // expect this is okay
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if (load != NULL)
SDL_RWread (src, load, len, 1);
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return load;
}
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static unsigned char * load_xcf_tile_rle (SDL_RWops * src, Uint32 len, int bpp, int x, int y) {
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unsigned char * load, * t, * data, * d;
Uint32 reallen;
int i, size, count, j, length;
unsigned char val;
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if (len == 0) { /* probably bogus data. */
return NULL;
}
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t = load = (unsigned char *) SDL_malloc (len);
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if (load == NULL)
return NULL;
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reallen = SDL_RWread (src, t, 1, len);
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data = (unsigned char *) SDL_calloc (1, x*y*bpp);
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for (i = 0; i < bpp; i++) {
d = data + i;
size = x*y;
count = 0;
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while (size > 0) {
val = *t++;
length = val;
if (length >= 128) {
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length = 255 - (length - 1);
if (length == 128) {
length = (*t << 8) + t[1];
t += 2;
}
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if (((size_t) (t - load) + length) >= len) {
break; /* bogus data */
} else if (length > size) {
break; /* bogus data */
}
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count += length;
size -= length;
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while (length-- > 0) {
*d = *t++;
d += bpp;
}
} else {
length += 1;
if (length == 128) {
length = (*t << 8) + t[1];
t += 2;
}
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if (((size_t) (t - load)) >= len) {
break; /* bogus data */
} else if (length > size) {
break; /* bogus data */
}
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count += length;
size -= length;
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val = *t++;
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for (j = 0; j < length; j++) {
*d = val;
d += bpp;
}
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}
}
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if (size > 0) {
break; /* just drop out, untouched data initialized to zero. */
}
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}
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SDL_free (load);
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return (data);
}
static Uint32 rgb2grey (Uint32 a) {
Uint8 l;
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l = (Uint8)(0.2990 * ((a & 0x00FF0000) >> 16)
+ 0.5870 * ((a & 0x0000FF00) >> 8)
+ 0.1140 * ((a & 0x000000FF)));
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return (l << 16) | (l << 8) | l;
}
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static void create_channel_surface (SDL_Surface * surf, xcf_image_type itype, Uint32 color, Uint32 opacity) {
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Uint32 c = 0;
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switch (itype) {
case IMAGE_RGB:
case IMAGE_INDEXED:
c = opacity | color;
break;
case IMAGE_GREYSCALE:
c = opacity | rgb2grey (color);
break;
}
SDL_FillRect (surf, NULL, c);
}
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static int
do_layer_surface(SDL_Surface * surface, SDL_RWops * src, xcf_header * head, xcf_layer * layer, load_tile_type load_tile)
{
xcf_hierarchy *hierarchy;
xcf_level *level;
unsigned char *tile;
Uint8 *p8;
Uint16 *p16;
Uint32 *p;
int i, j;
Uint32 x, y, tx, ty, ox, oy;
Uint32 *row;
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Uint32 length;
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SDL_RWseek(src, layer->hierarchy_file_offset, RW_SEEK_SET);
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hierarchy = read_xcf_hierarchy(src, head);
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if (hierarchy->bpp > 4) { /* unsupported. */
SDL_Log("Unknown Gimp image bpp (%u)\n", (unsigned int) hierarchy->bpp);
free_xcf_hierarchy(hierarchy);
return 1;
}
if ((hierarchy->width > 20000) || (hierarchy->height > 20000)) { /* arbitrary limit to avoid integer overflow. */
SDL_Log("Gimp image too large (%ux%u)\n", (unsigned int) hierarchy->width, (unsigned int) hierarchy->height);
free_xcf_hierarchy(hierarchy);
return 1;
}
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level = NULL;
for (i = 0; hierarchy->level_file_offsets[i]; i++) {
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if (SDL_RWseek(src, hierarchy->level_file_offsets[i], RW_SEEK_SET) < 0)
break;
if (i > 0) // skip level except the 1st one, just like GIMP does
continue;
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level = read_xcf_level(src, head);
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ty = tx = 0;
for (j = 0; level->tile_file_offsets[j]; j++) {
SDL_RWseek(src, level->tile_file_offsets[j], RW_SEEK_SET);
ox = tx + 64 > level->width ? level->width % 64 : 64;
oy = ty + 64 > level->height ? level->height % 64 : 64;
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length = ox*oy*6;
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if (level->tile_file_offsets[j + 1] > level->tile_file_offsets[j]) {
length = level->tile_file_offsets[j + 1] - level->tile_file_offsets[j];
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}
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tile = load_tile(src, length, hierarchy->bpp, ox, oy);
674
675
676
677
678
679
680
681
682
683
684
if (!tile) {
if (hierarchy) {
free_xcf_hierarchy(hierarchy);
}
if (level) {
free_xcf_level(level);
}
return 1;
}
685
686
687
688
p8 = tile;
p16 = (Uint16 *) p8;
p = (Uint32 *) p8;
for (y = ty; y < ty + oy; y++) {
689
if ((y >= surface->h) || ((tx+ox) > surface->w)) {
690
691
break;
}
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
row = (Uint32 *) ((Uint8 *) surface->pixels + y * surface->pitch + tx * 4);
switch (hierarchy->bpp) {
case 4:
for (x = tx; x < tx + ox; x++)
*row++ = Swap32(*p++);
break;
case 3:
for (x = tx; x < tx + ox; x++) {
*row = 0xFF000000;
*row |= ((Uint32)*p8++ << 16);
*row |= ((Uint32)*p8++ << 8);
*row |= ((Uint32)*p8++ << 0);
row++;
}
break;
case 2:
/* Indexed / Greyscale + Alpha */
switch (head->image_type) {
case IMAGE_INDEXED:
for (x = tx; x < tx + ox; x++) {
*row = ((Uint32)(head->cm_map[*p8 * 3]) << 16);
*row |= ((Uint32)(head->cm_map[*p8 * 3 + 1]) << 8);
*row |= ((Uint32)(head->cm_map[*p8++ * 3 + 2]) << 0);
*row |= ((Uint32)*p8++ << 24);
row++;
}
break;
case IMAGE_GREYSCALE:
for (x = tx; x < tx + ox; x++) {
*row = ((Uint32)*p8 << 16);
*row |= ((Uint32)*p8 << 8);
*row |= ((Uint32)*p8++ << 0);
*row |= ((Uint32)*p8++ << 24);
row++;
}
break;
default:
729
SDL_Log("Unknown Gimp image type (%d)\n", head->image_type);
730
731
732
733
734
735
736
737
738
739
if (hierarchy) {
free_xcf_hierarchy(hierarchy);
}
if (level)
free_xcf_level(level);
return 1;
}
break;
case 1:
/* Indexed / Greyscale */
740
switch (head->image_type) {
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
case IMAGE_INDEXED:
for (x = tx; x < tx + ox; x++) {
*row++ = 0xFF000000
| ((Uint32)(head->cm_map[*p8 * 3]) << 16)
| ((Uint32)(head->cm_map[*p8 * 3 + 1]) << 8)
| ((Uint32)(head->cm_map[*p8 * 3 + 2]) << 0);
p8++;
}
break;
case IMAGE_GREYSCALE:
for (x = tx; x < tx + ox; x++) {
*row++ = 0xFF000000
| (((Uint32)(*p8)) << 16)
| (((Uint32)(*p8)) << 8)
| (((Uint32)(*p8)) << 0);
++p8;
}
break;
default:
760
SDL_Log("Unknown Gimp image type (%d)\n", head->image_type);
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
if (tile)
free_xcf_tile(tile);
if (level)
free_xcf_level(level);
if (hierarchy)
free_xcf_hierarchy(hierarchy);
return 1;
}
break;
}
}
free_xcf_tile(tile);
tx += 64;
if (tx >= level->width) {
tx = 0;
ty += 64;
}
if (ty >= level->height) {
break;
}
782
}
783
free_xcf_level(level);
784
}
785
786
free_xcf_hierarchy(hierarchy);
787
788
return 0;
789
790
}
791
792
SDL_Surface *IMG_LoadXCF_RW(SDL_RWops *src)
{
793
Sint64 start;
794
const char *error = NULL;
795
796
797
798
SDL_Surface *surface, *lays;
xcf_header * head;
xcf_layer * layer;
xcf_channel ** channel;
799
int chnls, i, offsets;
800
Sint64 offset, fp;
801
802
803
unsigned char * (* load_tile) (SDL_RWops *, Uint32, int, int, int);
804
if (!src) {
805
806
807
/* The error message has been set in SDL_RWFromFile */
return NULL;
}
808
start = SDL_RWtell(src);
809
810
811
812
/* Initialize the data we will clean up when we're done */
surface = NULL;
813
814
815
816
head = read_xcf_header(src);
if (!head) {
return NULL;
}
817
818
819
820
821
822
823
824
825
switch (head->compr) {
case COMPR_NONE:
load_tile = load_xcf_tile_none;
break;
case COMPR_RLE:
load_tile = load_xcf_tile_rle;
break;
default:
826
SDL_Log("Unsupported Compression.\n");
827
828
829
830
831
free_xcf_header (head);
return NULL;
}
/* Create the surface of the appropriate type */
832
surface = SDL_CreateRGBSurface(SDL_SWSURFACE, head->width, head->height, 32,
833
0x00FF0000,0x0000FF00,0x000000FF,0xFF000000);
834
835
if ( surface == NULL ) {
836
error = "Out of memory";
837
838
839
840
841
goto done;
}
offsets = 0;
842
while ((offset = read_offset (src, head))) {
843
head->layer_file_offsets = (Uint32 *) SDL_realloc (head->layer_file_offsets, sizeof (Uint32) * (offsets+1));
844
head->layer_file_offsets [offsets] = (Uint32)offset;
845
846
847
offsets++;
}
fp = SDL_RWtell (src);
848
849
lays = SDL_CreateRGBSurface(SDL_SWSURFACE, head->width, head->height, 32,
850
0x00FF0000,0x0000FF00,0x000000FF,0xFF000000);
851
852
if ( lays == NULL ) {
853
error = "Out of memory";
854
855
856
857
858
859
goto done;
}
// Blit layers backwards, because Gimp saves them highest first
for (i = offsets; i > 0; i--) {
SDL_Rect rs, rd;
860
SDL_RWseek (src, head->layer_file_offsets [i-1], RW_SEEK_SET);
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
layer = read_xcf_layer (src, head);
if (layer != NULL) {
do_layer_surface (lays, src, head, layer, load_tile);
rs.x = 0;
rs.y = 0;
rs.w = layer->width;
rs.h = layer->height;
rd.x = layer->offset_x;
rd.y = layer->offset_y;
rd.w = layer->width;
rd.h = layer->height;
if (layer->visible)
SDL_BlitSurface (lays, &rs, surface, &rd);
free_xcf_layer (layer);
}
878
879
880
881
}
SDL_FreeSurface (lays);
882
SDL_RWseek (src, fp, RW_SEEK_SET);
883
884
885
886
// read channels
channel = NULL;
chnls = 0;
887
while ((offset = read_offset (src, head))) {
888
channel = (xcf_channel **) SDL_realloc (channel, sizeof (xcf_channel *) * (chnls+1));
889
fp = SDL_RWtell (src);
890
SDL_RWseek (src, offset, RW_SEEK_SET);
891
channel [chnls] = (read_xcf_channel (src, head));
892
893
if (channel [chnls] != NULL)
chnls++;
894
SDL_RWseek (src, fp, RW_SEEK_SET);
895
896
897
898
899
}
if (chnls) {
SDL_Surface * chs;
900
chs = SDL_CreateRGBSurface(SDL_SWSURFACE, head->width, head->height, 32,
901
0x00FF0000,0x0000FF00,0x000000FF,0xFF000000);
902
903
if (chs == NULL) {
904
error = "Out of memory";
905
906
907
908
goto done;
}
for (i = 0; i < chnls; i++) {
// printf ("CNLBLT %i\n", i);
909
if (!channel [i]->selection && channel [i]->visible) {
910
911
create_channel_surface (chs, (xcf_image_type)head->image_type, channel [i]->color, channel [i]->opacity);
SDL_BlitSurface (chs, NULL, surface, NULL);
912
913
914
}
free_xcf_channel (channel [i]);
}
915
SDL_free(channel);
916
917
918
919
SDL_FreeSurface (chs);
}
920
done:
921
free_xcf_header (head);
922
if ( error ) {
923
SDL_RWseek(src, start, RW_SEEK_SET);
924
925
926
927
if ( surface ) {
SDL_FreeSurface(surface);
surface = NULL;
}
928
IMG_SetError("%s", error);
929
930
931
932
933
934
}
return(surface);
}
#else
935
936
937
#if _MSC_VER >= 1300
#pragma warning(disable : 4100) /* warning C4100: 'op' : unreferenced formal parameter */
#endif
938
939
940
941
942
943
944
945
946
947
948
949
950
951
/* See if an image is contained in a data source */
int IMG_isXCF(SDL_RWops *src)
{
return(0);
}
/* Load a XCF type image from an SDL datasource */
SDL_Surface *IMG_LoadXCF_RW(SDL_RWops *src)
{
return(NULL);
}
#endif /* LOAD_XCF */